If you use the DVD, you can login as `root` and start a GUI with *startx*. If you use a USB .img file, it needs to be copied to a USB key directly. Use *dd* on unix-like systems, or [a similar program](http://www.chrysocome.net/dd) on Windows. You could also try [Image Writer for Windows](https://launchpad.net/win32-image-writer/+download).